ALEKO LM177 12/24V DC Universal Touch Panel Wired Keypad Code or ID Card Access Compatible with all ALEKO brand slide and swing gate openers and 12/24V DC gate or garage door openers from other brands as well Three different access modes: works with a password, with ALEKO LM107 ID cards, sold separately, or with a password and ID cards together Keyboard has a built in backlight for better visibility and easier operation at night Pair with ALEKOs LM107 or LM108 mounting post, sold separately, to make the keypad convenient and accessible Technical specifications: Idle current: &lt;30mA; Relative humidity: 10%-90%; Registered capacity: up to 2000 users; Responds at a distance of up to 8 centimeters